TM 55-1520-240-T
CHAPTER 10
FUEL SYSTEMS TROUBLESHOOTING
CHAPTER OVERVIEW
Chapter 10 contains procedures for Fuel Systems troubleshooting. Each fuel system and failure symptom
is listed below. Included in this chapter are locations and views of all electrical connectors, receptacles,
relays, and ground connections for Fuel System,
Refer to TM 55-1520-240-23 for required Fuel System maintenance procedures.
SYSTEM
PARA
ENGINE FUEL SHUTOFF AND CROSS-
FEED VALVES
10-1
FUEL BOOST PUMPS
10-2
SINGLE POINT PRESSURE REFUELING
10-3
FAILURE SYMPTOM LIST
ENGINE FUEL SHUTOFF AND CROSSFEED VALVES
SYMPTOM
TASK
SYMPTOM
TASK
SYMPTOM
TASK
CROSSFEED FUEL VALVE HANDLE IS NOT
ENGINE FUEL VALVE HANDLE IS NOT AT
NO. 1 ENGINE FUEL VALVE LIGHT DOES
AT CLSD WITH CROSSFEED FUEL VALVES
OPEN WITH FIRE HANDLE IN
10-1.4
NOT COME ON DURING PRESS-TO-TEST
10-1.4
SWITCH AT CLOSE
10-1.4
ENGINE FUEL VALVE LIGHT DOES NOT
NO.2 ENGINE FUEL VALVE LIGHT DOES
CROSSFEED FUEL VALVE HANDLE IS NOT
COME ON, VALVE OPERATION NORMAL
10-1.4
NOT COME ON DURING PRESS-TO-TEST
10-1.4
AT OPEN WITH CROSSFEED VALVES
SWITCH AT OPEN
10-1.4
ENGINE FUEL VALVE HANDLE IS NOT
RIGHT CROSSFEED FUEL VALVE LIGHT
AT CLSD WITH FIRE HANDLE PULLED
10-1.4
DOES NOT COME ON DURING PRESS-
CROSSFEED FUEL VALVE LIGHT DOES NOT
COME ON, VALVE OPERATION NORMAL
10-1.4
ENGINE FUEL SHUTOFF CIRCUIT BREAKER
DOES NOT STAY CLOSED
10-1.4
FUEL XFEED CONT CIRCUIT BREAKER
DOES NOT STAY CLOSED
LEFT CROSSFEED FUEL VALVE LIGHT
DOES NOT COME ON DURING PRESS-TO-
TEST
10-1.4
TO-TEST
10-1.4
10-1.4
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Change 2
10-2.1
